WHAT can you say to comfort a small girl who desperately wants to be big?

Precious little if you're the mother of a child like Hannah, who is one of just 200 primordial dwarfs - the tiniest in the world.

At 10, Hannah is just 2ft 10ins tall and weighs barely 21lbs. Jane Treays's often heart-breaking film follows five children like Hannah - all in the US - who've been short-changed by their chromosomes and face a tough future in a world that won't shrink to fit their needs.

"I've been climbing up things all my life to get what I want," explains 16-year-old Danny to explain his phenomenal upper-body strength.

Another boy who's just 3ft 2ins wants to become a basketball coach.

"I can do anything I want," he tells Treays defiantly - and you only wish that were true.